In the case of an authority created by a municipality subject to title 7, chapter 4, part 2, the authority shall, if otherwise applicable, be subject to §§7-4-205 and7-4-206 in addition to the metropolitan government; provided, that, notwithstanding any contrary provision of §§7-4-205 and7-4-206, the governing body of the municipality may, by resolution, designate the authority and its board of directors to be responsible for satisfaction of the requirements of the municipality and its governing body under §§ 7-4-205 and 7-4-206.